Chain drive for drying cylinders



Dec. 1,1925 1,563,324

' E. E. BERRY CHAIN DRIVE FOR DRYING CYLINDERS FiledDec. 15, 1925 2 Sheets-Sheet 1 Irv v EQIDFK ar/[I Berk Dec. 1, 1925 v 1,563,324

E. E. BERRY CHAIN DRIVE FOR DRYING CYLINDERS Filed'bec. 15, 1923 2 Sheets-sheaf, "2

' making machine wit Patented Dec. 1, 1925.

UNITED STATES 1,563,324 PATENT OFFICE.

EARL ELWIN BERRY, OF BELOII'. WISCONSIN, ASSIGNOR TO BELOIT IRON WORKS, OF BELOIT, WISCONSIN.

CHAIN DRIVE FOR DRYING CYLINDERS.

Application filed December 15, 1923. Serial No. 680,823.

To all whom it may concern:

Be it known that I, EARL E. BERRY, a cit izen of the United States, and a resident of the city ofBeloit, in the county of Rock and State of \Visconsin, have invented certain new and useful Improvements in a Chain Drive for Drying Cylinders; and I hereby declare that the following is a full, clear, and exact description of the same, reference being bad to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification. v

This invention relates more particularly to an improved chain drive for the drying cylinders of a paper making machine drier unit, thereby-eliminating the use of the old gear drive arrangement which has not proven entirely satisfactory, due to the fact that the gear teeth are often broken requiring the substitution of new gears and a consequent shutting down of the drier unit, and also due to the fact that it is difficult to keep the gear teeth in proper mesh when the gears become heated from the drying cylinders.

It is an object of this invention to pro vide the drying cylinders of a paper making machine with a chain drive; obviating vibrations and reducing noise and afiording an arrangement permitting haying out of the cylinders when the paper tears and bunches and further permitting ready access to the cylinder bearings and journals.

It is also an object of the invention to remove the enormous strain from the teeth of the driving gears of drying cylinders by replacing the large driving gears with smaller sprocket gears which are driven by means of a driving chain, thereby distributing the driving strain to a larger number of teeth of each gear thus material- 1y reducing the breaking of the gear teeth and obviating shutting down of the machine for repairs.

It is a further object of the invention to provide a chain drive for drying cylinders, thereby afi'ording a construction in which the cylinder bearlngs and journals are easily accessible and wherein bunched paper from between the cylinders may be readily removed transversely of the machine.

It is an important object of this invention to provide the dryin I cylinders of a paper a drive chain operable by means of a plurality of motors connected to drive selected upper and lower drier cylinders from which the chain driving the remaining cylinders is operated, said driving arrangement obviating excessive noises and vibrations which usually accompany meshing gear driven drying cylinders when driven at high speed.

Other and further important objects of this invention will be apparent from the disclosures in the specification and accompanying drawings.

This invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

' On the drawings:

Figure 1 is a diagrammatic side elevation of the drier unit of a paper making machine provided with a chain drive embodying the principles of this invention.

Figure 2 is an enlarged fragmentary detail side elevation of a portion of the machine drier unit.

Figure 3 is a fragmentary detail sectio a gear 7. A plurality of guide rolls 8 are provided for en porting endless felt conveyors 9 embracing about half of the circumference of each cylinder. The felt conveyors 9 are provided for conducting a web to be dried through the machine in contact with the drying cylinders 1, 2, 3 and 6, which are steam heated. I I

Each of the drying cylinders is provided with an end closure plate 10 having a ring flange or hub 11 integrally formed thereon.

One end of each drying cylinder is support-- ed by a trunnion 12 journalled in a hearing sleeve 13. The bearing sleeves form part of gear housings 14 supported on the framework 15 of the machine.

Bolted, or otherwise rigidly secured to the flange 11 of each cylinder, is a rin sprocket 16. A continuous driving chain 1 engages alternately over the sprocket 16 of an upper cylinder and then around the lower portion of the periphery of a lower cylinder sprocket as illustrated in Figure 2. From the last cylinder sprocket the chain is guided by a. plurality of sprockets 18 and an adjustable sprocket 19 to the first cylinder sprocket at'the other end of the dryer unit. The sprocket 19 is longitudinally adjustable by means of the mechanism 20 (Figure 1) to permit proper tensioning of the chain 17.

It will be noted that the drying cylinders are chain driven one from the other from the main driving cylinders 3 and 6, which, in turn, are driven from the motors 4 and 5 respectively, or from any other suitable source of power. The chain 17 engages substantially half of the teeth of each sprocket at a time, thereby distributing the strain on the teeth and thereby greatly reducing the breaking off of teeth. The delays ordi narily encountered in the replacing of the driving gears on the types of drying units at present in use is thus obviated.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention and I therefore do not purpose limiting the patent granted hereon, otherwise than necessitated by the prior art.

I claim as my invention 1. In a paper drying machine drier unit a drying cylinder, 21. flange formed thereon, a sprocket secur ed to said flange, and a chain trained around the sprocket to drive the cylinder.

2. In a pa er drying machine drier unit a drying cy inder, a hub member formed thereon, a sprocket secured to said hub memher, a chain trained around the sprocket, and

means for operating the chain to cause rota tion of the sprocket and cylinder.

3. In a paper drying machine drier unit, a drying cylinder, a hub flange formed on one end thereof, a ring sprocket secured to said hub flange, a housing for said sprocket, and a chain passing through said housing and engaging said sprocket to cause rotation of the sprocket and cylinder.

4:. In a paper drier unit a main drying cylinder. means connected therewith for ro tating the same, a plurality of secondary cylinders, a hub flange formed on one end of each said secondary cylinders and on said main cylinder, a continuous chain engaging said sprockets to cause the drive from said main cylinder to be imparted to the secondary cylinders, and means for adjusting the tension of said chain.

The combination with a paper making machine drier unit, of a chain driving mechanism therefor, and means for adjusting the tension of said chain.

6. In a. drier unit for a paper machine, a plurality of drying cylinders and a chain mechanism for driving said cylinders one from the other.

7. In a drier unit, a plurality of drying cylinders, sprockets secured to the ends of said cylinders and an endless chain meshing with each of said sprockets for driving said cylinders.

8. In a drier unit, a plurality of drying cylinders, means for driving certain of said cylinders and endless chain mechanisms for driving the other cylinders from said driven cylinders.

In testimony whereof I have hereunto subscribed my name.

EARL EL'WIN BERRY. 

